Some adaptations of two species of salamanders are in the table below.
Which statement best compares the areas where the axolotl and tiger salamanders live based on their adaptations?
The diagram represents a cellular process.
Which molecule is a direct product of this cellular process?
A food web is shown.
Identify and explain ONE effect that the removal of mice would have on the food web.
Review the food web carefully. Then enter your answer and your explanation in the box provided.
The diagram shows a process that occurs during the development of an organism.
Which statement explains how the different cell types in the image are formed?
The diagram shows a type of chromosomal mutation.
What type of mutation is shown?
This question has two parts.
Between 2005 and 2016, the Kenai Fjords in Alaska experienced an increase in exposed rock due to melting ice. These rock formations are known as "nunataks," which are the tips of mountains that were left uncovered by glaciers in the last ice age. Nunataks are shown in the image.
Part A
Which time timeline describes how plant diversity on the nunataks will change over time?
A Venn diagram comparing viruses to bacteria is shown. Which traits apply to each diagram?
Drag the answers to the correct boxes.
Kelp forests are critical ecosystems that provide habitats to a variety of animals, including sea urchins, sea stars, sea anemones, crabs, jellyfish, snails, and fish. They also provide hunting grounds for mammals, including sea otters, sea lions, seals and many different birds. In recent years scientists have documented an increase in shark attacks on sea otters in and around kelp forests.
Which consequence is most likely to occur in kelp forests as a result of increased predation of sea otters?
Which statement best describe the difference between active transport and passive transport?
Achondroplasia is an inherited condition that affects the formation of bone in humans. The allele for achondroplasia (A) is dominant to the unaffected allele (a).
If a person who is homozygous dominant has children with a person who is homozygous recessive, what percentage of their children will likely have achondroplasia?
Enter your answer in the box. Your answer must be a whole number.
Scientists observe traits of cells on four microscope slides and record their observations in a table. Based on scientists' observations, identify the cell type for each microscope slide in the table.
Move the correct answer to each box. Each answer may be used more than once.
The Venn diagram compares two kingdoms.
Which labels could be used to fill in the blanks?
The body sometimes needs to send messages long distances by releasing hormones into the bloodstream. The hormones are then carried to the target location.
Which body systems are involved in this interaction?
Move the correct answer to each box. Not all answers will be used.
The system releases hormones into the bloodstream, and the system carries them to the target location.
Trichonympha are mutualistic microorganism found in the gut of termites. Which statement BEST explains the relationship between Trichonympha and termites?
Blue whales and narwhals are both marine mammals in Order Cetacea. Which other classification must these whales share?
Which table correctly identifies the function of each type of RNA?
A diagram of a process occurs during one of the stages of the cell cycle is shown.
Which answer choice best identifies the process illustrated and the stage of the cell cycle in which it occurs?
Which plant response would best aid a plant in maximizing and retaining water acquired during a drought?
Two mutations of a genetic sequence are shown. A DNA codon chart is also shown.
Which mutation would have the MOST significant impact on the gene product?
Why would the impact be so significant?
Review the diagram carefully. Then enter your answer and your explanation in the box provided.
The salamanders of the genus Ambystoma in northeastern North America are an entirely female population that reproduces asexually through the process of cloning. However, they have developed a way of inserting DNA from other species of salamanders into their own DNA.
How has DNA from other salamander species helped these Ambystoma salamanders survive environmental changes over the past 6 million years?
The feedback loop for blood calcium homeostasis is shown.
According to the diagram, which four body systems are interacting to maintain blood calcium homeostasis?
A diagram of removing glucose from the blood by a fat cell is shown.
Which statement best describes the role of insulin and glucose-transport proteins in the process?
A Texas horned lizard (Phrynosoma cornutum) and a Texas bluebonnet (Lupis texensis) are shown.
These two DNA sequences best provide evidence that -
In the late 1700s Edward Jenner developed the first vaccine from cowpox, an infectious virus found in cows. How do viruses, like the one responsible for cowpox, cause disease?
When sawdust is added to soil, organisms in the soil will use all the available nitrogen to break the sawdust down. What effect will the lack of nitrogen have on the plants that are near the sawdust?
A cell undergoing a biological process is shown.
Which process occurs between Step 2 and Step 3 and creates more genetic diversity in the resulting cells?
Certain species of the coral-like sea organisms called bryozoans first appeared about 140 million years ago. They remained unchanged for the first 40 million years and then suddenly experienced rapid genetic change.
Which process would BEST account for the pattern of evolution of bryozoans?
The function of an enzyme in a biochemical reaction is to -
A diagram of the steps in the production of a protein is shown.
Which description identifies the purpose of Step A in this process?
Spores of the fungus Ustilago maydis land and grown on sweet corn. The fungus then infects the plant tissue, extracting nutrients from the plant's cells.
The relationship between sweet corn and Ustilago maydis can best be described as -
Which of these properties is found only in cancer cells?
Albumin is a protein that is secreted by liver cells and transported to the bloodstream. What factor most directly determines the amino acids that are combined to create albumin?
The table shows the predominant plant types on a piece of land in the years following a disturbance.
Based on the data in the table, which disturbance most likely led to this progression?
There are approximately 113 species and subspecies of snakes in Texas. Why would it be important for scientists to use a standardized taxonomic system when naming each species of snake?
A student is looking at a classroom aquarium full of goldfish (Carassius auratus). The student tells a friend, "I love this community of goldfish."
Why is the student incorrect to classify the goldfish as a community?
During early stages of development, dolphin embryos begin to develop hind limbs. By the time dolphin fetuses are fully developed, the hind limbs have disappeared.
Which statement best describes the early development and then disappearance of the hind limbs in dolphins?
The images show a cell in various phases of mitosis.
Which of these lists the phases in the correct the order that occur in mitosis?
The figure shows fossilized and living stalk-eyed flies from the family Diopsidae. In fossils, the eye spans of the flies are much smaller than those of living flies.
Which question would BEST help determine whether the change in eye span in stalk-eyed flies influenced by natural selection?
Use the information below to answer the questions in Part A and Part B.
Roots of different plants can be connected by a network of underground fungal extensions called hyphae. These fungi contribute minerals to the plants, and the plants contribute carbohydrates to the fungi.
Part A
Which statement about the transportation of these substances within the plant is true?
The Florida panther (Puma concolor coryi) population had declined to approximately 20 to 30 individuals as a result of habitat loss and hunting. Many of the panthers had genetic mutations due to inbreeding that affected their ability to reproduce and survive. Female Texas (Puma concolor stanleyana) pumas were introduced into Florida to mate with the endangered population of panthers. Hybrid panthers had more genetic variation and reproductive success than the Florida panthers.
Which table best represents the mechanism of evolution and the effect on the gene pool of the Florida population?
The temperature at which American alligator eggs are incubated will affect the gender of the offspring. Eggs kept at 30oC tend to hatch mostly female, while eggs kept at 33oF tend to hatch mostly male.
Which statement explains why the temperature affects the gender of the alligator hatchlings?
Which pair of statements best compares the primary functions of the carbohydrate chitin and the protein chitinase?
A student creates a dichotomous key to identify birds.
Based on the key, which characteristics are shared by the red-winged blackbird and the hair woodpecker?
Select TWO correct answers.
A food chain is shown.
Which model best represents the amount of energy available for the use of each trophic level represented in the food chain?
The base sequence of a segment of DNA is shown.
Which base sequence correctly completes DNA Strand 2?
Part B
Which evidence supports the answer to Part A?
Part B
Which statement supports the answer to Part A?
